PNNL

Abstract

One planned configuration for this lysimeter test is placing cementitious waste forms above glass waste forms with a backfill buffer in between. In support of this proposed arrangement, and the overall understanding of the role of multiple components on glass corrosion, the objective of this study is to investigate the impact of major elements present in a cementitious (or grout)-contacted solution on the dissolution behavior of borosilicate glass. A combination of single pass flow-through (SPFT, ASTM C1662-18) tests, and a static leach testing, product consistency test (PCT, ASTM C1285-18), were used to study borosilicate glass corrosion in grout- contacted solutions and solutions that varied the presence of dissolved cementitious species (Si, Ca, Al, Na, and K) was used. Treated samples were characterized to better link the solution-based corrosion behavior and changes to the glass.